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Slender columns are frequently used in hotels, apartments, and office buildings, often positioned in lobby areas or drop-off zones. These columns, which can exceed 10 m in height, are sometimes constrained by architectural aesthetics. Their placement—whether at the building’s base, middle, or top—often subjects them to significant earthquake forces, particularly when located at the structure’s perimeter. Unlike short columns, which fail due to material failure, slender columns primarily collapse due to buckling. This study examines slender column design in an 18-story reinforced concrete building using ETABS Ver 22 software, addressing critical stability concerns and earthquake resilience. The analysis incorporates the Moment Magnifier Method (sway and non-sway) and Direct P-Delta calculations, demonstrating the role of shear walls in mitigating seismic effects. Results show significant discrepancies between analytical and software calculations: moment magnification factors (δs) averaged 0.386 times software values, while Direct P-Delta analysis showed 0.473 times. The analytical/software ratio for slenderness parameters was 0.540, indicating substantial differences in computational approaches. These findings contribute to optimizing slender column design for improved structural stability and material efficiency in earthquake-prone regions, supporting sustainable construction practices.

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Structural Performance of Slender Columns in High-Rise Buildings: A Computational Design Approach

  • 会议论文

  • 发表日期：

    2026年

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  • Daud Rahmat Wiyono,
  • Yosafat Aji Pranata,
  • Anang Kristianto,
  • Andrias Suhendra Nugraha,
  • Noek Sulandari,
  • Cindrawaty Lesmana

摘要

Slender columns are frequently used in hotels, apartments, and office buildings, often positioned in lobby areas or drop-off zones. These columns, which can exceed 10 m in height, are sometimes constrained by architectural aesthetics. Their placement—whether at the building’s base, middle, or top—often subjects them to significant earthquake forces, particularly when located at the structure’s perimeter. Unlike short columns, which fail due to material failure, slender columns primarily collapse due to buckling. This study examines slender column design in an 18-story reinforced concrete building using ETABS Ver 22 software, addressing critical stability concerns and earthquake resilience. The analysis incorporates the Moment Magnifier Method (sway and non-sway) and Direct P-Delta calculations, demonstrating the role of shear walls in mitigating seismic effects. Results show significant discrepancies between analytical and software calculations: moment magnification factors (δs) averaged 0.386 times software values, while Direct P-Delta analysis showed 0.473 times. The analytical/software ratio for slenderness parameters was 0.540, indicating substantial differences in computational approaches. These findings contribute to optimizing slender column design for improved structural stability and material efficiency in earthquake-prone regions, supporting sustainable construction practices.